Add general purpose hasing functions to pgbench.
Hashing function is useful for simulating real-world workload in test like
WEB workload, as an example - YCSB benchmarks.
Author: Ildar Musin with minor editorization by me
Reviewed by: Fabien Coelho, me
Discussion: https://www.postgresql.org/message-id/flat/
0e8bd39e-dfcd-2879-f88f-
272799ad7ef2@postgrespro.ru